Phulu yopangidwa ndi phula kusakanikirana mbewu imagawika mitundu itatu, ndi moto bola la phula, phula la pesungunule ndi phula zachilengedwe.

Phula la Moluru Tarrul ndi lopanga, ndiye kuti, chinthu chakuda chomwe chatsalira chitapiritsidwa cha phula. Kusiyana pakati pa chinthu ichi ndi phulusa zoyenga bwino kuli kokha mu zinthu zakuthupi, ndipo palibe malire ena. Phula la Blace Phuru ili ndi zinthu monga phenanthrene ndi pyrene zomwe zimavuta kusanzira. Zinthu izi ndizowopsa. Chifukwa zomwe zili muzosakaniza izi ndizosiyana, kuchuluka kwa phula lamoto kuvunda kumasiyananso. Kuphatikiza apo, phula kusakanikirana chomera amauza ogwiritsa ntchito kuti kusintha kwa kutentha kumakhudza kwambiri phula la malasha ngati phula. Izi ndizotentha kwambiri mu dzinja komanso zosavuta kufewetsa nthawi yachilimwe.
Petroleums amatanthauza zotsalazo pambuyo poti mafuta osadulidwa. Nthawi zambiri, kutengera kuchuluka kwa kuyeretsa, mafuta a petroleum adzakhala mumadzimadzi, malo olimba kapena olimba. Phula lazachilengedwe limasungidwa mobisa, ndipo ena amathanso kupanga zigawo za mchere kapena kudziunjikira padziko lapansi kutumphuka kwa dziko lapansi. Phula lazachilengedwe nthawi zambiri limakhala lopanda zinthu zopweteka chifukwa zimasinthidwa mwachilengedwe komanso kuchuluka kwa oxidid.